14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR1.5k papers
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- Humboldt-Universität zu BerlinDE1.4k papers
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- University of OxfordGB1.3k papers
- National Institute for Subatomic PhysicsNL1.3k papers
- Columbia UniversityUS1.2k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.2k papers
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61 papers · 1 filter
Topological Invariants For Lens Spaces And Exceptional Quantum Groups
R. B. Zhang
The Reshetikhin - Turaev invariants arising from the quantum groups associated with the exceptional Lie algebras , and at odd roots of unity are constructed and ex…
Modulation of AGN gamma rays by interaction with X-rays from an accretion disk hot spot
W. Bednarek, R. J. Protheroe
We have developed a model for the variability of gamma ray emission in jets of active galactic nuclei in which the variability arises as a result of photon-photon pair production i…
The Flavor Asymmetry of the Nucleon Sea
F. M. Steffens, A. W. Thomas
We re-examine the effects of anti-symmetry on the anti-quarks in the nucleon sea arising from gluon exchange and pion exchange between confined quarks. While the effect is primaril…
Symmetrizable Quantum Affine Superalgebras And Their Representations
R. B. Zhang
Aspects of the algebraic structure and representation theory of the quantum affine superalgebras with symmetrizable Cartan matrices are studied. The irreducible integrable highest…
Subtractive Renormalization of Strong-Coupling Quenched QED in Four Dimensions
Frederick T. Hawes, Tom Sizer, Anthony G. Williams
We study renormalized quenched strong-coupling QED in four dimensions in arbitrary covariant gauge, in the Dyson-Schwinger equation formalism. Above the chiral critical coupling, w…
Bott - Borel - Weil Construction For Quantum Supergroup Uq(gl(m|n))
R. B. Zhang
The finite dimensional irreducible representations of the quantum supergroup are constructed geometrically using techniques from the Bott - Borel - Weil theory and v…
A chiral bag model approach to delta electroproduction
D. H. Lu, A. W. Thomas, A. G. Williams
Helicity amplitudes for the transition are calculated using the cloudy bag model. A correction for center-of-mass motion is carried out using a modified Peierls-Thoul…
Gamma rays from interactions of stars with AGN jets
W. Bednarek, R. J. Protheroe
We have developed a model for gamma ray emission in jets of active galactic nuclei in which particle acceleration takes place at a shock in the relativistic jet plasma due to a mas…
Entropy and Uncertainty of Squeezed Quantum Open Systems
D. Koks, A. Matacz, B. L. Hu
We define the entropy S and uncertainty function of a squeezed system interacting with a thermal bath, and study how they change in time by following the evolution of the reduced d…
Variation of hadron masses in finite nuclei
K. Saito, K. Tsushima, A. W. Thomas
The quark-meson coupling model, based on a mean-field description of non-overlapping nucleon bags bound by the self-consistent exchange of , and mesons, is extended to i…
Intertwiners in Orbifold Conformal Field Theories
P. S. Montague
Following on from earlier work relating modules of meromorphic bosonic conformal field theories to states representing solutions of certain simple equations inside the theories, we…
Instantons and the information metric
David Groisser, Michael K. Murray
The information metric arises in statistics as a natural inner product on a space of probability distributions. In general this inner product is positive semi-definite but is poten…
Structure And Representations Of The Quantum General Linear Supergroup
R. B. Zhang
The structure and representations of the quantum general linear supergroup GLq(m|n) are studied systematically by investigating the Hopf superalgebra Gq of its representative funct…
Minimal Uncertainty States For Quantum Groups
R. Delbourgo, R. B. Zhang
The problem of how to obtain quasi-classical states for quantum groups is examined. A measure of quantum indeterminacy is proposed, which involves expectation values of some natura…
Lickorish Invariant And Quantum OSP(1|2)
R. B. Zhang, H. C. Lee
Lickorish's method for constructing topological invariants of 3 - manifolds is generalized to the quantum supergroup setting. An invariant is obtained by applying this method to th…
The involutive structure on the blow-up of R^n in C^n
Michael Eastwood, C. Robin Graham
We investigate the natural involutive structure on the blow-up of in extending the complex structure on the complement of the exceptional hypersurface. Ou…
Fusing the coordinates of quantum superspace
Peter Bouwknegt, Jim McCarthy, Peter van Nieuwenhuizen
We introduce the notion of a fused quantum superplane by allowing for terms in the defining relations. We develop the differential calculus for a large class of fused qu…
Relativistic effects in parity-violating electron- deuteron scattering and strangeness in the nucleon
G. I. Poulis
Deuteron electrodisintegration is described in a relativistic PWIA framework. The reduction to the factorized PWIA, and the effect thereof on the observables accessible in parity-v…
Von Neumann spectra near the spectral gap
Alan L. Carey, Thierry Coulhon, Varghese Mathai +1
In this paper we study some new von Neumann spectral invariants associated to the Laplacian acting on L^2 differential forms on the universal cover of a closed manifold. These inva…
Einstein's Equations in the Presence of Signature Change
Tevian Dray
We discuss Einstein's field equations in the presence of signature change using variational methods, obtaining a generalization of the Lanczos equation relating the distributional…
Gravity and Signature Change
Tevian Dray, George Ellis, Charles Hellaby +1
The use of proper ``time'' to describe classical ``spacetimes'' which contain both Euclidean and Lorentzian regions permits the introduction of smooth (generalized) orthonormal fra…
Calculations of Higher Twist Distribution Functions in the MIT Bag Model
A. I. Signal
We calculate all twist-two, three and four parton distribution functions involving two quark correlations using the wavefunction of the MIT bag model. The distributions are evolved…
On the Interpretation of the NA51 Experiment
F. M. Steffens, A. W. Thomas
We study the Drell-Yan asymmetry, recently measured by the NA51 collaboration, and conclude that the value quoted by their experiment only sets a lower limit on the asymmetry…
Determinant lines, von Neumann algebras and torsion
A. Carey, M. Farber, V. Mathai
In this paper, we suggest a construction of determinant lines of finitely generated Hilbertian modules over finite von Neumann algebras. Nonzero elements of the determinant lines c…